class Point { public int x; public int y; public Point(int x, int y) { this.x = x; this.y = y; } public override string ToString() { //(x,y)값 return String.Format("({0},{1})",x,y); } // + 연산자 메서드 public static Point operator +(Point pt1, Point pt2) { return (new Point(pt1.x + pt2.x, pt1.y + pt2.y)); } // - 연산자 메서드 public static Point operator -(Point pt1, Point pt2) { return (new Point(pt1.x - p..